feat: ✨ Make PWA installable with icons and screenshots

utils/auth.ts

@@ -0,0 +1,48 @@
+import { nanoid } from "nanoid";
+
+export const signInWithCode = (code: string, appData: ApplicationData) => {
+    const identity = useCurrentIdentity();
+    const identities = useIdentities();
+    const client = useClient();
+
+    client.value
+        ?.fetchAccessToken(
+            appData.client_id,
+            appData.client_secret,
+            code,
+            new URL("/", useRequestURL().origin).toString(),
+        )
+        .then(async (res) => {
+            const tempClient = useClient(res.data).value;
+
+            const [accountOutput, instanceOutput] = await Promise.all([
+                tempClient.verifyAccountCredentials(),
+                tempClient.getInstance(),
+            ]);
+
+            // Get account data
+            if (
+                !identities.value.find(
+                    (i) => i.account.id === accountOutput.data.id,
+                )
+            )
+                identity.value = {
+                    id: nanoid(),
+                    tokens: res.data,
+                    account: accountOutput.data,
+                    instance: instanceOutput.data,
+                    permissions: [],
+                    emojis: [],
+                };
+
+            // Remove code from URL
+            window.history.replaceState(
+                {},
+                document.title,
+                window.location.pathname,
+            );
+
+            // Redirect to home
+            window.location.pathname = "/";
+        });
+};